Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 13, Issue 5, Pages 399-402Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2011.02.001
Keywords
Multi-wall carbon nanotubes; Sulfur composite materials; High power rate; Lithium battery
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Funding
- National Natural Science Foundation of China [50902095]
- Shanghai Rising-Star Program [07QA14034]
- National 973 Program [2007CB209700]
- Specialized Research Fund for the Doctoral Program of Higher Education [20070248088]
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Sulfur-based ternary composite cathode materials containing multi-wall carbon nanotubes (MWCNTs) were prepared and investigated. Tested by coin type cells, the composite materials exhibited the sulfur utilization approaching to 95.3%, the capacity retention close to 96.5% for 100 cycles, and high power rate capability up to 7C. The excellent electrochemical performance can be attributed to the homogeneous dispersion of MWCNTs in the composites, which not only accommodates the volume change during charge/discharge processes, but also provides stable electrical and ionic transfer channels. (C) 2011 Elsevier B.V. All rights reserved.
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